Bimodal Fluorescence and Magnetic Resonance Imaging Using Water-Soluble Hexagonal NaYF₄:Ce,Tb,Gd Nanocrystals

Figure 5

MR relaxation properties. (a) 𝑇₁-weighted MR images of NaYF₄:Ce,Tb,Gd NCs, at varying mass and Gd³⁺ molar concentrations. Deionized water (0 mM) was used as the reference sample. (b) The plot of relaxation rate R₁ as a function of Gd³⁺ concentration measured from 3T MRI scanner.

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